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Method and system to combine a digital graphics object and a digital picture

a technology of digital graphics and objects, applied in television systems, instruments, color signal processing circuits, etc., can solve problems such as scaling programs that may inadvertently change the values of color-key pixels, and graphics objects intended to be overlaid on digital pictures may not necessarily be the correct siz

Active Publication Date: 2005-06-23
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] The problems noted above are solved in large part by a method and related system of combining a graphics object with a picture. Some of the exemplary embodiments may be a method comprising combining a graphics object with a digital picture by reading luminance and chr

Problems solved by technology

However, graphics objects intended to be overlaid on digital pictures may not necessarily be the correct size.
In the process of scaling, the scaling program may inadvertently change the values of color-key pixels within the graphics object.

Method used

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  • Method and system to combine a digital graphics object and a digital picture
  • Method and system to combine a digital graphics object and a digital picture
  • Method and system to combine a digital graphics object and a digital picture

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Embodiment Construction

[0010] The problems noted above are solved in large part by a method and related system of combining a graphics object with a picture. Some of the exemplary embodiments may be a method comprising combining a graphics object with a digital picture by reading luminance and chrominance values of the graphics object pixel, and writing only the luminance value of the graphics object pixel to the corresponding picture pixel if the chrominance values of the graphics object pixel indicate transparency and the luminance value indicates non-transparency.

[0011] Other exemplary embodiments may be a system comprising a processor and a memory coupled to the processor. The processor, executing a program, overlays a graphics object on a picture by replacing only a luminance value of a picture pixel with a luminance value of a graphics object pixel if the graphics object pixel indicates partial transparency.

[0012] Yet other exemplary embodiments may be a method comprising overlaying a graphics obj...

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Abstract

Combining a graphics object with a picture where only the luminance value of a graphics object pixel is written to a corresponding picture pixel if the chrominance values of the graphics object pixel indicate transparency and yet the luminance value indicates non-transparency.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of European Patent Application No. 03293278.2 filed Dec. 19, 2003, and incorporated herein by reference as if reproduced in full below. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] Embodiments of the invention are directed to methods and related systems of improving image quality when overlaying a digital graphics object on a digital picture. More particularly, the embodiments of the invention are directed to detecting and correcting pixels in the graphic object with slight color-key variation caused by scaling and / or filtering. [0005] 2. Description of the Related Art [0006] Digital pictures, whether a single picture or a series of pictures representing video, may be modified by the addition of special effects, such as overlaying a graphics object on the digital picture. The graphics object m...

Claims

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Application Information

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IPC IPC(8): G09G5/00G09G5/02
CPCG09G5/02G09G2340/12G09G2340/10G09G5/026H04N5/275H04N9/641H04N9/75G09G2340/0407
Inventor GOTTARDO, DAVIDLAFON, PHILIPPE
Owner TEXAS INSTR INC